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US Patent: 620,652
Combined Nut and Pipe Wrench
Patentees:
Leslie K. Hollyman - Kansas City, MO
Benoni Swearingen - Kansas City, MO

USPTO Classifications:
81/168, 81/186

Tool Categories:
wrenches : pipe and nut combination wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
F. S. Thrasher
M.  R. Remley

Patent Dates:
Applied: May 28, 1898
Granted: Mar. 07, 1899

Patent Pictures:
Leslie K. Hollyman and Benoni Swearingen patent March 7, 1899
USPTO pdf tiff
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Description:
Turning the handle adjusts the jaw openings. The major claim of the patent is that the ball bearings in the adjustment make it very difficult to "stick" the wrench; i.e. adjust it so tight that a hammer is needed to loosen its grip. A set screw "locks" the adjustment.

Corresponding Canadian patent no. CA-62,882 was granted March 13, 1899.

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